7 files changed, 20 insertions, 21 deletions

diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index 09370392aff1..c3e61b366493 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -79,7 +79,7 @@ config 29BIT
 
 config 32BIT
         bool
-        default y if CPU_SH5
+        default y if CPU_SH5 || !MMU
 
 config PMB
         bool "Support 32-bit physical addressing through PMB"
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c
index 2cfae81914aa..92eb98633ab0 100644
--- a/arch/sh/mm/cache-sh4.c
+++ b/arch/sh/mm/cache-sh4.c
@@ -114,7 +114,7 @@ static void sh4_flush_dcache_page(void *arg)
         struct address_space *mapping = page_mapping(page);
 
         if (mapping && !mapping_mapped(mapping))
-                set_bit(PG_dcache_dirty, &page->flags);
+                clear_bit(PG_dcache_clean, &page->flags);
         else
 #endif
                 flush_cache_one(CACHE_OC_ADDRESS_ARRAY |
@@ -239,7 +239,7 @@ static void sh4_flush_cache_page(void *args)
                  * another ASID than the current one.
                  */
                 map_coherent = (current_cpu_data.dcache.n_aliases &&
-                        !test_bit(PG_dcache_dirty, &page->flags) &&
+                        test_bit(PG_dcache_clean, &page->flags) &&
                         page_mapped(page));
                 if (map_coherent)
                         vaddr = kmap_coherent(page, address);
diff --git a/arch/sh/mm/cache-sh7705.c b/arch/sh/mm/cache-sh7705.c
index f498da1cce7a..7729cca727eb 100644
--- a/arch/sh/mm/cache-sh7705.c
+++ b/arch/sh/mm/cache-sh7705.c
@@ -139,7 +139,7 @@ static void sh7705_flush_dcache_page(void *arg)
         struct address_space *mapping = page_mapping(page);
 
         if (mapping && !mapping_mapped(mapping))
-                set_bit(PG_dcache_dirty, &page->flags);
+                clear_bit(PG_dcache_clean, &page->flags);
         else
                 __flush_dcache_page(__pa(page_address(page)));
 }
diff --git a/arch/sh/mm/cache.c b/arch/sh/mm/cache.c
index ba401d137bb9..88d3dc3d30d5 100644
--- a/arch/sh/mm/cache.c
+++ b/arch/sh/mm/cache.c
@@ -60,14 +60,14 @@ void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
                        unsigned long len)
 {
         if (boot_cpu_data.dcache.n_aliases && page_mapped(page) &&
-            !test_bit(PG_dcache_dirty, &page->flags)) {
+            test_bit(PG_dcache_clean, &page->flags)) {
                 void *vto = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
                 memcpy(vto, src, len);
                 kunmap_coherent(vto);
         } else {
                 memcpy(dst, src, len);
                 if (boot_cpu_data.dcache.n_aliases)
-                        set_bit(PG_dcache_dirty, &page->flags);
+                        clear_bit(PG_dcache_clean, &page->flags);
         }
 
         if (vma->vm_flags & VM_EXEC)
@@ -79,14 +79,14 @@ void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
                          unsigned long len)
 {
         if (boot_cpu_data.dcache.n_aliases && page_mapped(page) &&
-            !test_bit(PG_dcache_dirty, &page->flags)) {
+            test_bit(PG_dcache_clean, &page->flags)) {
                 void *vfrom = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
                 memcpy(dst, vfrom, len);
                 kunmap_coherent(vfrom);
         } else {
                 memcpy(dst, src, len);
                 if (boot_cpu_data.dcache.n_aliases)
-                        set_bit(PG_dcache_dirty, &page->flags);
+                        clear_bit(PG_dcache_clean, &page->flags);
         }
 }
 
@@ -98,7 +98,7 @@ void copy_user_highpage(struct page *to, struct page *from,
         vto = kmap_atomic(to, KM_USER1);
 
         if (boot_cpu_data.dcache.n_aliases && page_mapped(from) &&
-            !test_bit(PG_dcache_dirty, &from->flags)) {
+            test_bit(PG_dcache_clean, &from->flags)) {
                 vfrom = kmap_coherent(from, vaddr);
                 copy_page(vto, vfrom);
                 kunmap_coherent(vfrom);
@@ -141,7 +141,7 @@ void __update_cache(struct vm_area_struct *vma,
 
         page = pfn_to_page(pfn);
         if (pfn_valid(pfn)) {
-                int dirty = test_and_clear_bit(PG_dcache_dirty, &page->flags);
+                int dirty = !test_and_set_bit(PG_dcache_clean, &page->flags);
                 if (dirty)
                         __flush_purge_region(page_address(page), PAGE_SIZE);
         }
@@ -153,7 +153,7 @@ void __flush_anon_page(struct page *page, unsigned long vmaddr)
 
         if (pages_do_alias(addr, vmaddr)) {
                 if (boot_cpu_data.dcache.n_aliases && page_mapped(page) &&
-                    !test_bit(PG_dcache_dirty, &page->flags)) {
+                    test_bit(PG_dcache_clean, &page->flags)) {
                         void *kaddr;
 
                         kaddr = kmap_coherent(page, vmaddr);
diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
index 038793286990..40733a952402 100644
--- a/arch/sh/mm/consistent.c
+++ b/arch/sh/mm/consistent.c
@@ -79,21 +79,20 @@ void dma_generic_free_coherent(struct device *dev, size_t size,
 void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
                     enum dma_data_direction direction)
 {
-#if defined(CONFIG_CPU_SH5) || defined(CONFIG_PMB)
-        void *p1addr = vaddr;
-#else
-        void *p1addr = (void*) P1SEGADDR((unsigned long)vaddr);
-#endif
+        void *addr;
+
+        addr = __in_29bit_mode() ?
+               (void *)P1SEGADDR((unsigned long)vaddr) : vaddr;
 
         switch (direction) {
         case DMA_FROM_DEVICE:           /* invalidate only */
-                __flush_invalidate_region(p1addr, size);
+                __flush_invalidate_region(addr, size);
                 break;
         case DMA_TO_DEVICE:             /* writeback only */
-                __flush_wback_region(p1addr, size);
+                __flush_wback_region(addr, size);
                 break;
         case DMA_BIDIRECTIONAL:         /* writeback and invalidate */
-                __flush_purge_region(p1addr, size);
+                __flush_purge_region(addr, size);
                 break;
         default:
                 BUG();
diff --git a/arch/sh/mm/kmap.c b/arch/sh/mm/kmap.c
index 15d74ea42094..ec29e14ec5a8 100644
--- a/arch/sh/mm/kmap.c
+++ b/arch/sh/mm/kmap.c
@@ -34,7 +34,7 @@ void *kmap_coherent(struct page *page, unsigned long addr)
         enum fixed_addresses idx;
         unsigned long vaddr;
 
-        BUG_ON(test_bit(PG_dcache_dirty, &page->flags));
+        BUG_ON(!test_bit(PG_dcache_clean, &page->flags));
 
         pagefault_disable();
 
diff --git a/arch/sh/mm/uncached.c b/arch/sh/mm/uncached.c
index 8a4eca551fc0..a7767da815e9 100644
--- a/arch/sh/mm/uncached.c
+++ b/arch/sh/mm/uncached.c
@@ -28,7 +28,7 @@ EXPORT_SYMBOL(virt_addr_uncached);
 
 void __init uncached_init(void)
 {
-#ifdef CONFIG_29BIT
+#if defined(CONFIG_29BIT) || !defined(CONFIG_MMU)
         uncached_start = P2SEG;
 #else
         uncached_start = memory_end;